[2]Kalbreyer set off from Liverpool in November 1876 and arrived at the island of Fernando Po in the Gulf of Guinea on Christmas Eve before travelling on to Victoria in Cameroon a week later.
Once again, he collected some extraordinary forms of Odontoglossum including 0. tripudians, 0. crocidipterum and the rare 0. blandum together with related species such as Oncidium hastilabium and Otoglossum chiriquense.
According to the account in Hortus Veitchii, "passing from the water-shed of the Atrato to the plains, he was particularly struck by the richness of the vegetation",[7] especially the luxuriant palm trees, of which he collected specimens of more than 100 species.
Here he also collected samples of the giant arum, Anthurium veitchii,[3] with leaves over six feet in length, which had been discovered by a previous Veitch employee, Gustav Wallis in 1874.
[7] After sending several consignments of orchids to Chelsea, Kalbreyer returned to England in September 1880, bringing with him many living plants and some 360 species of dried ferns, including eighteen new discoveries.
[20] The small genus of Acanthus, Kalbreyeriella (Lindau) , found in Brazil, Colombia, Costa Rica, Ecuador, Panamá and Peru,[21] also bears Kalbreyer's name.